Subthreshold FIR Filter Architecture for Ultra Low Power Applications


Mishra, Biswajit and M. Al-Hashimi, Bashir (2008) Subthreshold FIR Filter Architecture for Ultra Low Power Applications. In, LNCS. International Workshop on Power and Timing Modeling, Optimization and Simulation (PATMOS 2008) , Springer, 1-10.

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Description/Abstract

Subthreshold design has been proposed as an effective technique for designing signal processing circuits needed in wireless sensor nodes powered by sources with limited energy. In this paper we propose a subthreshold FIR architecture which brings the benefits of reducedleakage energy, reduced minimum energy point, reduced operating voltage and increased operating frequency when compared with recently reported subthreshold designs. We shall demonstrate this through the design of a 9-tap FIR filter operating at 220mV with operational frequency of 126kHz/sample consuming 168.3nW or 1.33pJoules/sample. Furthermore, the area overhead of the proposed method is less than that of the transverse structure often employed in subthreshold filter designs. For example, a 9-tap filter based on transverse structure has 5X higher area than the filter designed using our proposed method.

Item Type: Book Section
Additional Information: Chapter: 1 Event Dates: September 10-12, 2008
ISBNs: 9783540959472
Keywords: Subthreshold design, FIR, Minimum Energy Point, Ultra Low Power Design, Leakage
Divisions: Faculty of Physical Sciences and Engineering > Electronics and Computer Science > Electronic & Software Systems
ePrint ID: 266089
Date Deposited: 09 Jul 2008 15:41
Last Modified: 27 Mar 2014 20:11
Publisher: Springer
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/266089

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